web_L21_10BIO311C - BIO 311C Spring 2010 Your Exam 2 will...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
BIO 311C Spring 2010 Lecture 21 – Monday 22 Mar. 1 Your Exam 2 will be returned to you at the end of today’s class period. An answer key for Exam 2 will be posted before the end of today. If you believe we have made any error in grading your Exam 2, please see Rebecca this week. We will not consider any requests for reconsideration of Exams 1 or 2 answers after 4:00 p.m. on Tuesday 30 March.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
A chemical reaction that takes place within a living organism or within a living cell is called a metabolic reaction . The sum of all chemical reactions that take place within a living organism or within a living cell is called the metabolism of the organism or of the cell. * Definitions: Chemical Reactions in Living Cells 2
Background image of page 2
A chemical reaction might be written very simply as: A B , For the reaction written as: W + X Y + Z , W, X, Y and Z are all substrates, W and X are reactants, Y and Z are products. Metabolic reactions operate under exactly the same set of chemical principles as reactions that take place in a chemistry laboratory. * DEFINITION: By convention, the substrate written on the left (A) is called a reactant , while the substrate written on the right (B) is called a product. where A and B represent atoms, molecules or ions that participate in the reaction. Both A and B are then called substrates . 3
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
All chemical reactions are (in principle) reversible. If the reaction: occurs, AB then the reaction: can also occur, BA In general it is possible to know the characteristics of any reaction by knowing corresponding characteristics of its reverse reaction. Thus the reaction can be written more meaningfully as: * A is the reactant while B is the product in the reaction as shown above, but the reaction could just as well have been written as B A , where B is shown as the reactant and A as the product. 4
Background image of page 4
In this course we will consider two important aspects of chemical reactions, especially as they apply to metabolism. 1. Today we will begin a consideration of energy changes that occur as reactions take place. The study of changes in energy which occur during chemical reactions is a field of chemistry called chemical thermodynamics . These energy changes are called chemical energetics . 2. Later we will consider the rates of chemical reactions and their relationships to mechanisms of reactions. The study of these rates of chemical reactions is called chemical kinetics . * 5
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
3. Calculate the equilibrium constant (abbreviated as K eq ) for the reaction after it has come to equilibrium as: AB Consider a chemical reaction in which substrate A is converted into substrate B: Then do the following experiment: 1. Dissolve molecules of A, or molecules of B, or some mixture of the two, into a container of water under conditions that allow this reaction to occur. Maintain the temperature and other environmental factors under a standard set of condition (Temperature at 25°C, for example).
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 06/11/2010 for the course BIO 48765 taught by Professor Sathasvian during the Spring '10 term at University of Texas at Austin.

Page1 / 20

web_L21_10BIO311C - BIO 311C Spring 2010 Your Exam 2 will...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online